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LP2975 - MOSFET LDO Driver/Controller

Description

A high-current LDO regulator is simple to design with the LP2975 LDO Controller.

Using an external P-FET, the LP2975 will deliver an ultra low dropout regulator with extremely low quiescent current.

High open loop gain assures excellent regulation and ripple rejection performance.

Features

  • n n n n n n n n n n n n Simple to use, few external components Ultra-small mini SO-8 package 1.5% (A grade) precision output voltage Low-power shutdown input < 1 µA in shutdown Low operating current (180 µA typical @ VIN = 5V) Wide supply voltage range (1.8V to 24V) Built-in current limit amplifier Overtemperature protection 12V, 5V, and 3.3V standard output voltages Can be programmed using external divider.
  • 40˚C to +125˚C junction temperature range.

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Full PDF Text Transcription

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LP2975 MOSFET LDO Driver/Controller September 1997 LP2975 MOSFET LDO Driver/Controller General Description A high-current LDO regulator is simple to design with the LP2975 LDO Controller. Using an external P-FET, the LP2975 will deliver an ultra low dropout regulator with extremely low quiescent current. High open loop gain assures excellent regulation and ripple rejection performance. The trimmed internal bandgap reference provides precise output voltage over the entire operating temperature range. Dropout voltage is “user selectable” by sizing the external FET: the minimum input-output voltage required for operation is the maximum load current multiplied by the RDS(ON) of the FET.
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